<?xml version="1.0" encoding="UTF-8"?>
<schema targetNamespace="http://www.opengis.net/gml" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:gml="http://www.opengis.net/gml" xmlns:sch="http://www.ascc.net/xml/schematron" xmlns="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified" version="3.0.2">
  <annotation>
    <appinfo source="urn:opengis:specification:gml:schema-xsd:geometryComplexes:v3.0.1">geometryComplexes.xsd</appinfo>
    <documentation>
      GML is an OGC Standard.
      Copyright (c) 2001,2002,2010 Open Geospatial Consortium, Inc. All Rights Reserved.
      To obtain additional rights of use, visit http://www.opengeospatial.org/legal/ .
    </documentation>
  </annotation>
  <include schemaLocation="geometryAggregates.xsd"/>
  <!-- =========================================================== -->
  <element name="CompositeCurve" type="gml:CompositeCurveType" substitutionGroup="gml:_Curve"/>
  <!-- =========================================================== -->
  <complexType name="CompositeCurveType">
    <annotation>
      <documentation>
				A CompositeCurve is defined by a sequence of (orientable) curves such that the each curve in the sequence terminates at the start point of the subsequent curve in the list.
			</documentation>
    </annotation>
    <complexContent>
      <extension base="gml:AbstractCurveType">
        <sequence>
          <element ref="gml:curveMember" maxOccurs="unbounded">
            <annotation>
              <documentation>This element references or contains one curve in the composite curve. The curves are contiguous, the collection of curves is ordered.
NOTE: This definition allows for a nested structure, i.e. a CompositeCurve may use, for example, another CompositeCurve as a curve member.</documentation>
            </annotation>
          </element>
        </sequence>
      </extension>
    </complexContent>
  </complexType>
  <!-- =========================================================== -->
  <element name="CompositeSurface" type="gml:CompositeSurfaceType" substitutionGroup="gml:_Surface"/>
  <!-- =========================================================== -->
  <complexType name="CompositeSurfaceType">
    <annotation>
      <documentation>A CompositeSurface is defined by a set of orientable surfaces. A composite surface is geometry type with all the geometric properties of a (primitive) surface. Essentially, a composite surface is a collection of surfaces that join in pairs on common boundary curves and which, when considered as a whole, form a single surface. </documentation>
    </annotation>
    <complexContent>
      <extension base="gml:AbstractSurfaceType">
        <sequence>
          <element ref="gml:surfaceMember" maxOccurs="unbounded">
            <annotation>
              <documentation>This element references or contains one surface in the composite surface. The surfaces are contiguous.
NOTE: This definition allows for a nested structure, i.e. a CompositeSurface may use, for example, another CompositeSurface as a member.</documentation>
            </annotation>
          </element>
        </sequence>
      </extension>
    </complexContent>
  </complexType>
  <!-- =========================================================== -->
  <element name="CompositeSolid" type="gml:CompositeSolidType" substitutionGroup="gml:_Solid"/>
  <!-- =========================================================== -->
  <complexType name="CompositeSolidType">
    <annotation>
      <documentation>
				A composite solid is a geometry type with all the geometric properties of a (primitive) solid. 
				Essentially, a composite solid is a collection of solids that join in pairs on common boundary surfaces and which, when considered as a whole, form a single solid. 
			</documentation>
    </annotation>
    <complexContent>
      <extension base="gml:AbstractSolidType">
        <sequence>
          <element ref="gml:solidMember" maxOccurs="unbounded">
            <annotation>
              <appinfo>
                <sch:pattern>
                  <sch:rule context="gml:solidMember">
                    <sch:extends rule="hrefOrContent"/>
                  </sch:rule>
                </sch:pattern>
              </appinfo>
              <documentation>This element references or contains one solid in the composite solid. The solids are contiguous.
NOTE: This definition allows for a nested structure, i.e. a CompositeSolid may use, for example, another CompositeSolid as a member.</documentation>
            </annotation>
          </element>
        </sequence>
      </extension>
    </complexContent>
  </complexType>
  <!-- =========================================================== -->
  <!-- complex/composite geometry objects -->
  <!-- =========================================================== -->
  <element name="GeometricComplex" type="gml:GeometricComplexType" substitutionGroup="gml:_Geometry"/>
  <!-- =========================================================== -->
  <complexType name="GeometricComplexType">
    <annotation>
      <documentation>
				A geometric complex.
			</documentation>
    </annotation>
    <complexContent>
      <extension base="gml:AbstractGeometryType">
        <sequence>
          <element name="element" type="gml:GeometricPrimitivePropertyType" maxOccurs="unbounded"/>
        </sequence>
      </extension>
    </complexContent>
  </complexType>
  <!-- =========================================================== -->
  <complexType name="GeometricComplexPropertyType">
    <annotation>
      <documentation>A property that has a geometric complex as its value domain can either be an appropriate geometry element encapsulated in an element of this type or an XLink reference to a remote geometry element (where remote includes geometry elements located elsewhere in the same document). Either the reference or the contained element must be given, but neither both nor none.
NOTE: The allowed geometry elements contained in such a property (or referenced by it) have to be modelled by an XML Schema choice element since the composites inherit both from geometric complex *and* geometric primitive and are already part of the _GeometricPrimitive substitution group.</documentation>
    </annotation>
    <choice minOccurs="0">
      <element ref="gml:GeometricComplex"/>
      <element ref="gml:CompositeCurve"/>
      <element ref="gml:CompositeSurface"/>
      <element ref="gml:CompositeSolid"/>
    </choice>
    <attributeGroup ref="gml:AssociationAttributeGroup">
      <annotation>
        <documentation>This attribute group includes the XLink attributes (see xlinks.xsd). XLink is used in GML to reference remote resources (including those elsewhere in the same document). A simple link element can be constructed by including a specific set of XLink attributes. The XML Linking Language (XLink) is currently a Proposed Recommendation of the World Wide Web Consortium. XLink allows elements to be inserted into XML documents so as to create sophisticated links between resources; such links can be used to reference remote properties.
A simple link element can be used to implement pointer functionality, and this functionality has been built into various GML 3 elements by including the gml:AssociationAttributeGroup.</documentation>
      </annotation>
    </attributeGroup>
  </complexType>
  <!-- =========================================================== -->
</schema>
